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2012 IEEE International Frequency Control Symposium Proceedings最新文献

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One-way two-color fiber link for frequency transfer 用于频率传输的单向双色光纤链路
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243671
J. Hanssen, S. Crane, C. Ekstrom
{"title":"One-way two-color fiber link for frequency transfer","authors":"J. Hanssen, S. Crane, C. Ekstrom","doi":"10.1109/FCS.2012.6243671","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243671","url":null,"abstract":"We discuss our work on two-color one-way frequency transfer over optical fiber. We have expanded on our previous work by extending the wavelength separation by using one channel in the C band at 1553nm and the other channel in the O band at 1310nm. Both wavelengths have low loss and are well suited to use in optical fiber networks. We present measurements of the improved two-color phase delay as a function of temperature and compare that to the actual phase delay brought about by temperature induced length changes in the link. We also show improved closed loop performance of the link, including the dependence on the total length of the link.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117142818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Thermogravimetric analysis with a heated quartz crystal microbalance 用加热石英晶体微天平热重分析
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243694
Ward L. Johnson, Elisabeth Mansfield
{"title":"Thermogravimetric analysis with a heated quartz crystal microbalance","authors":"Ward L. Johnson, Elisabeth Mansfield","doi":"10.1109/FCS.2012.6243694","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243694","url":null,"abstract":"Thermogravimetric analysis (TGA) with an SC-cut quartz crystal microbalance (QCM) was demonstrated at temperatures in the range from 20°C to 450°C. A measurement system was built around a crystal sensor head that was mounted in a small tube furnace. Changes in third-overtone C-mode frequencies of the crystal were measured during thermally activated decomposition and combustion of a poly(methyl methacrylate) (PMMA) film with an initial mass of approximately 6 μg, and corresponding changes in mass Δm were estimated through the use of the Sauerbrey equation. Noise and drift in frequencies and associated Δm were determined through least-squares fitting and compared with commercially available high-resolution conventional TGA systems. The microbalance-based TGA (μ-TGA) system is found to have one to two orders of magnitude lower noise than high-resolution TGA at temperatures below 200°C and to have at least an order of magnitude lower drift over the entire measured temperatures. However, increasing temperature dependence of crystal frequencies at elevated temperatures and noise in temperature measurements lead to noise in the determination of temperature-dependent mass above 400°C that is comparable in magnitude to that of high-resolution TGA. Enhancements in performance of μ-TGA depend primarily on the implementation of reliable piezoelectric resonators with low temperature dependence over the entire measured range.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117287592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Phase-noise measurement of a 670 GHz source 670 GHz源的相位噪声测量
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243679
J. A. Desalvo, A. Hati, C. Nelson, D. Howe
{"title":"Phase-noise measurement of a 670 GHz source","authors":"J. A. Desalvo, A. Hati, C. Nelson, D. Howe","doi":"10.1109/FCS.2012.6243679","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243679","url":null,"abstract":"We present phase-noise measurements in support of terahertz electronics. Using digital phase-noise measurement techniques and an even-harmonic mixer, we achieve a phase-noise measurement system in waveguide (WR1.5). At 670 GHz an upper bound of this system's noise floor is found to be -20, -40, and -60 dBc/Hz at 1, 100, and 10000 Hz offsets, respectively. In addition, a commercial, low-phase-noise, 670 GHz source is measured at offset frequencies from 0.1 Hz to 1 MHz.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122993537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Utmost OCXO solutions based on the IHR technology 基于IHR技术的极致OCXO解决方案
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243578
I. Abramzon, V. Tapkov, A. Kornilov
{"title":"Utmost OCXO solutions based on the IHR technology","authors":"I. Abramzon, V. Tapkov, A. Kornilov","doi":"10.1109/FCS.2012.6243578","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243578","url":null,"abstract":"The internally heated quartz resonators (IHR) for a long time had been an attractive solution for development of small size fast warming-up low power OCXOs. However in the frequency stability and phase-noise level they yielded noticeably to conventional OCXO designs based on the external oven structure. Along with complexity of the manufacturing process that restricted application of the IHR technology by the low and intermediate stability oscillators intended for portable battery supply devices. The present paper reports of creation of a new generation of the miniature low power OCXOs based on advanced IHR technology possessing excellent frequency stability and phase-noise parameters feasible heretofore only with high-end conventional OCXOs.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128701879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A 100 MHz MEMS SiBAR phase modulator for quadrature phase shift keying 用于正交相移键控的100mhz MEMS SiBAR相位调制器
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243734
L. Sorenson, F. Ayazi
{"title":"A 100 MHz MEMS SiBAR phase modulator for quadrature phase shift keying","authors":"L. Sorenson, F. Ayazi","doi":"10.1109/FCS.2012.6243734","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243734","url":null,"abstract":"A technique is proposed to employ the phase shifting capability of a MEMS resonator to form the basic component of a switchless quadrature phase shift keying (QPSK) scheme. The advantages of such an approach include direct baseband to RF modulation, no generation of intermodulation products since the resonator is operated linearly, and small size, cost, and power dissipation. An example phase modulator system built using a 100 MHz SiBAR demonstrates at least 54° of relative phase shift.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128295297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vibration-insensitive 61-MHz micromechanical disk reference oscillator 振动不敏感61-MHz微机械盘参考振荡器
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243738
T. Naing, T. Rocheleau, Z. Ren, E. Alon, C. Nguyen
{"title":"Vibration-insensitive 61-MHz micromechanical disk reference oscillator","authors":"T. Naing, T. Rocheleau, Z. Ren, E. Alon, C. Nguyen","doi":"10.1109/FCS.2012.6243738","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243738","url":null,"abstract":"A low phase noise oscillator referenced to a 61-MHz vibrating wine-glass disk resonator with anchor-isolating supports designed to suppress microphonics has posted (without any compensation) a measured acceleration sensitivity at least as good as Γ ~0.2ppb/g for vibration frequencies up to 2kHz and in all directions, yielding a vector magnitude Γ less than 0.5ppb/g. Remarkably, this result is at least 30 times better than previous work using a similar wine-glass disk resonator and is the best mark among MEMS-based oscillators to date, including those aided by feedback compensation circuits. It is also more than an order of magnitude better than an off-the-shelf crystal oscillator and is now comparable with low sensitivity oven-controlled crystal oscillators (OCXO's). Such low sensitivity to environmental vibration by a tiny uncompensated MEMS-based oscillator is expected to enable harsh environment and military applications that require stable and compact reference oscillators.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129994951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Frequency steering and the control of UTC(K) 变频调速及UTC(K)控制
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243587
Y. Haibo, Guang Wei
{"title":"Frequency steering and the control of UTC(K)","authors":"Y. Haibo, Guang Wei","doi":"10.1109/FCS.2012.6243587","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243587","url":null,"abstract":"The atomic clock are the key device in the time keeping system, however, the output frequency of an atomic clock always is different to the International Atomic Time(TAI), and among the atomic clock group the master clock directly affects the performance of the UTC(K), so it is necessary to steer the frequency of the master clock to the TAI In general, the output frequency of the master clock is steered by a micro-phase stepper. In this paper, the method and theory of how to calculate the steering data is discussed with the clock rate and local Atomic Time(TA), and then an experiment of frequency steering of UTC(K) is done. The conclusions of the experiment show that the method and the theory are correct and the frequency steering software can be used in the control of UTC(K).","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116515551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Cesium active optical clock in four-level laser configuration 四能级激光结构中的铯有源光学时钟
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243657
Yanfei Wang, Xiaobo Xue, Dongying Wang, Tonggang Zhang, Q. Sun, Yelong Hong, Zhuang Wei, Jingbiao Chen
{"title":"Cesium active optical clock in four-level laser configuration","authors":"Yanfei Wang, Xiaobo Xue, Dongying Wang, Tonggang Zhang, Q. Sun, Yelong Hong, Zhuang Wei, Jingbiao Chen","doi":"10.1109/FCS.2012.6243657","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243657","url":null,"abstract":"We propose an active optical clock scheme in four-level configuration with cesium atoms. The population inversion has been established experimentally between 7S1/2 state and 6P3/2 state in a thermal cesium cell with a 455.5 nm pumping laser. It can be used to generate active optical clock laser output in a bad cavity laser regime at the wavelength of 1469 nm.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121717013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Performance comparison of composite clock estimates for two types of models 两种模式下复合时钟估计的性能比较
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243696
A. A. Abdellatif, M. Suess
{"title":"Performance comparison of composite clock estimates for two types of models","authors":"A. A. Abdellatif, M. Suess","doi":"10.1109/FCS.2012.6243696","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243696","url":null,"abstract":"The paper compares the impact of two type of clock models onto the stability of the estimates and its time offset prediction error. The two types of clock models are the classical three state model and one which is extended by additional Markov states. The extension has got the capability to model Flicker noise which is dominant for averaging times longer than 1 day for different clock types, eg. Cesium clock. The performance of both models is compared by simulating a typical laboratory assemble consisting of two Active Hydrogen Masers (AHM) and three Cesium clocks. In particular, the prediction performance to time intervals up to two weeks is addressed since this is of relevance for UTC applications.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"332 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115973738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
SAW filters with reconfigurable transition bands 具有可重构过渡带的SAW滤波器
2012 IEEE International Frequency Control Symposium Proceedings Pub Date : 2012-05-21 DOI: 10.1109/FCS.2012.6243601
Xiaoming Lu, K. Mouthaan, J. Galipeau, E. Briot, B. Abbott
{"title":"SAW filters with reconfigurable transition bands","authors":"Xiaoming Lu, K. Mouthaan, J. Galipeau, E. Briot, B. Abbott","doi":"10.1109/FCS.2012.6243601","DOIUrl":"https://doi.org/10.1109/FCS.2012.6243601","url":null,"abstract":"A surface acoustic wave (SAW) filter with a reconfigurable upper transition band is presented. This is achieved through the reuse of SAW resonators by incorporating single pole double throw (SPDT) GaAs switches. The reconfigurable filter with two states is demonstrated around the 700 MHz frequency range currently allocated to LTE bands. The EM simulation results are obtained from a 3D EM model built in Ansys HFSS. Fabricated SAW dies and GaAs switch dies are assembled in a 7×9×1.4 mm3 SMP package. Measured results agree well with the EM simulations. In the first state the center frequency is 687.8 MHz and the BW is 2.4%. In the second state the center frequency is 691.1 MHz and the BW is 3.4%. The shift in the upper transition band is 0.95%.","PeriodicalId":256670,"journal":{"name":"2012 IEEE International Frequency Control Symposium Proceedings","volume":"05 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125881145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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